"""Each preset is well formed: the shape garden.py reads."""

import json
import pathlib
import sys

KINDS = {"mandelbrot", "julia"}


def problems(preset):
    if preset.get("kind", "mandelbrot") not in KINDS:
        yield f"kind is one of {sorted(KINDS)}"
    center = preset.get("center")
    if not (isinstance(center, list) and len(center) == 2):
        yield "center is [x, y]"
    if not (isinstance(preset.get("span"), (int, float)) and preset["span"] > 0):
        yield "span is a number above 0"
    if not (isinstance(preset.get("palette"), str) and len(preset["palette"]) >= 2):
        yield "palette is at least two characters"
    if preset.get("kind") == "julia" and not isinstance(preset.get("c"), list):
        yield "a julia set names its c, as [re, im]"


bad = 0
for path in sorted(pathlib.Path("presets").glob("*.json")):
    try:
        found = list(problems(json.loads(path.read_text())))
    except json.JSONDecodeError as e:
        found = [f"not JSON: {e}"]
    for p in found:
        print(f"{path}: {p}")
        bad += 1
    if not found:
        print(f"{path}: ok")
sys.exit(1 if bad else 0)